【英文标准名称】:Fineceramics(advancedceramics,advancedtechnicalceramics)-Weibullstatisticsforstrengthdata
【原文标准名称】:细陶瓷(高级陶瓷、高级工业陶瓷).强度数据的维伯统计
【标准号】:ISO20501-2003
【标准状态】:现行
【国别】:国际
【发布日期】:2003-12
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC206
【标准类型】:()
【标准水平】:()
【中文主题词】:陶瓷;测定;试验方法;统计分布;高级工业陶瓷;机械试验;定义;探伤;试验;材料强度;魏布尔分布
【英文主题词】:Advancedtechnicalceramics;Ceramics;Definitions;Determination;Flawdetection;Mechanicaltesting;Statisticaldistribution;Strengthofmaterials;Testmethod;Testing;Weibulldistribution
【摘要】:ThisInternationalStandardcoversthereportingofuniaxialstrengthdataandtheestimationofprobabilitydistributionparametersforadvancedceramicswhichfailinabrittlefashion.Thefailurestrengthofadvancedceramicsistreatedasacontinuousrandomvariable.Typically,anumberoftestspecimenswithwell-definedgeometryarebroughttofailureunderwell-definedisothermalloadingconditions.Theloadatwhicheachspecimenfailsisrecorded.Theresultingfailurestressesareusedtoobtainparameterestimatesassociatedwiththeunderlyingpopulationdistribution.ThisInternationalStandardisrestrictedtotheassumptionthatthedistributionunderlyingthefailurestrengthsisthetwo-parameterWeibulldistributionwithsizescaling.Furthermore,thisInternationalStandardisrestrictedtotestspecimens(tensile,flexural,pressurizedring,etc.)thatareprimarilysubjectedtouniaxialstressstates.Subclauses5.4and5.5outlinemethodsofcorrectingforbiaserrorsintheestimatedWeibullparameters,andtocalculateconfidenceboundsonthoseestimatesfromdatasetswhereallfailuresoriginatefromasingleflawpopulation(i.e.,asinglefailuremode).Insampleswherefailuresoriginatefrommultipleindependentflawpopulations(e.g.,competingfailuremodes),themethodsoutlinedin5.4and5.5forbiascorrectionandconfidenceboundsarenotapplicable.Measurementsofthestrengthatfailurearetakenforoneoftworeasons:eitherforacomparisonoftherelativequalityoftwomaterials,orthepredictionoftheprobabilityoffailure(oralternativelythefracturestrength)forastructureofinterest.ThisInternationalStandardpermitsestimatesofthedistributionparameterswhichareneededforeither.Inaddition,thisInternationalStandardencouragestheintegrationofmechanicalpropertydataandfractographicanalysis.
【中国标准分类号】:Q32
【国际标准分类号】:81_060_30
【页数】:33P.;A4
【正文语种】:英语